Bolt anchor



Apr. 24, 192 3.

J. KARITZKY BOLT ANCHOR Filed y 6, 1922 IIIIIIII 1III/IIIII{II(IIIII%IIIIIIIIIIAh v gnaw I v 8 8 'L emto'c' Patented Apr.24, 1923.

UNITED STATES 1,452,514 PATENT": OFFICE.

JOHN KARITZKY, 0F GARWOOD, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS,TO HENRY B. NEWHALL, OF PLAINFIELD, NEW JERSEY.

BOLT ANCHOR.

Application filed July 6, 1922. Serial No. 573,162.

To all whom it may concern:

Be it known that I, JOHN KAnrrzKY, a citizen of the United States,residing at Garwood in the county of Union and State of New Zlersey,have made certain new and useful Improvements in Bolt Anchors, of whichthe following is a specification, taken in connection with theaccompanying drawings.

My invention relates to bolt anchors and more particularly to anexpansion shield formed of sheet metal having an integral.

head and tines, which can be expanded either by a nail or screw,

My invention further relates to certain combinations, sub-combinations,articles of manufacture and details of construction all of which will bemore fully hereinafter described and pointed out in the claims.

In the drawings I have shown two embodiments of my invention but it isof course to be understood that my invention is not,

to be confined tov the embodiments shown by way of illustration.

Fi 1- is a plan view of a blank of sheet meta from which my expansionshield is formed;

Fig. 2 is a side elevation and vertical sec-- tion substantially on theline 2-2 of Fig. 1; Fig. 3 is aside elevation partly in section of thefinished expansion shield on the line 33 of Fig. 5-;

Fig. 4 is a section, substantially on the line 4-4 of Fig. 5, looking inthe direction of the arrows,'and showing in addition the wall. orsupport, and the work supported by the bolt anchor;

Fig. 5 is an end elevation of the expansion shield;

Fig. 6 is a vertical section similar to Fig. 4, showing the nail drivenhome and the tines expanded;

Fig. 7 is a vertical section, similar to Fig. 6, but showing ascrew'expanding the shield;

Fi 8 is a longitudinal section of myv expansion shield provided withinterior screwthreads;

Fi 9 isa vertical section on line 9-9 of Fig. 8, looking in thedirection of the arrows;

Fig. 10 is a plan view, on a smaller scale, f my expansion shield.

The blank 1, Fig. 1, is cut from a sheet of sheet metal, preferablysteel, and provided with a head 2, having the opening 6. At the sametime that he head 2 is formed,

form a cylindrical body member of les:

diameter than the head 2.

"NVhen the flutes are employed, the metal on the interior of the tinesis forced inward,

= forming longitudinally extending ribs 8, 8.

These ribs and their complementary grooves 5, 5 are not brought up tothe head 2, but start at the point 9, Fig. 4. The grooves 5, 5 arepreferably formed of progressively-increased depth from the point 9 tothe end of the shield. This will cause the ribs 8, 8 to taper slightlyfrom the point 18 to the end 19 of the shield.

The expanding member, which may be a nail 10, engages with theselongitudinally extending ribs 8, 8, and as the nail is driven into theexpansion shield, the tines are forced apart or expanded as shown inFig. 6, securely holding the work 11, of any form, to the face 12 of thewall or'other suitable support 1.3. By arranging the grooves and ribs asI have just described, the expansion takes place back from the surface12 of the wall and does not tend to crack or mar the surface of saidwall.

Instead of using the nail 10 with a head 14 to expand the shield, I mayuse a,screw 15. Such a screw may be used which will cooperate with andbear upon the longitudinally extending ribs 8, 8, as shown in Figs.

' 4,5 and 6.

-I may, however, provide the tines 4 and 5 with interruptedscrew-threads 16, 16,which may be stamped into the blank, as shown. forexample in Figs. 8. and 9. These figures are the same as the otherfigures, except for. these internal screw-threads. In this form, thenail 10 maybe used as well as the screw 15, theexpanding members beinginterchangeable in both forms.

By making the reenforced head2 of greater diameter than the body member,formed of the tines 4 and 5. I permit the head to engage on the outersurface of the work 11 and hold it to the wall or other suitable support13. as shown in Figs. 4, 6 and 7'. Having thus described this inventionin connection with illustrative embodiments thereof, to the details ofwhich I do not desire to be limited, what is claimed as new and what isdesired to secure by Letters Patent is set forth in the appended claims.

lVhat I claim is p 1. An expansion shield formed of sheet metal having ahead formed of a plurality of thicknesses of the said sheet metal andintegral tines connected to the head. said tines being fluted to formlongitudinal internal ribs.

2. The combination in a bolt anchor of a sheet metal expansiol'i shieldhaving an integral head of greater diameter and thickness than the bodyof the shield, integral tines connected to the head and provided withinterior longitudinal ribs and an expanding member adapted to expand thetines by engaging said ribs.

' 3. An expansion shield formed of sheet metal having a head formed of aplurality of thicknesses of said sheet metal. and integral tinesconnected to the head, said tines provided with inclined flutes to forminclined interior ribs. said inclined interior ribs progressing inheight from the head to the end of the tines to cooperate directly with,and be expanded by, an expanding member as said member progresses intothe shield.

4:. The combination of an expansion shi 1d formed of sheet metal havingahead and integralvtines connected to the head, said tines provided withinclined flutes to form inclined interior ribs, said inclined interiorribs progressing in height from the head to the end of the tines tocooperate directly with, and be expanded by, an expanding member as saidmember progresses into the shield, and an expanding member adapted toengage with and expand the tines as it is forced into the shield.

5. The combination of an expansion shield formed of sheet metal having ahead formed of a plurality of thicknesses of said sheet metal andintegral tines connected to' the head. said tines provided with inclinedflutes to form inclined interior ribs. said inclined interior ribsprogressing in height from the head to the end of the tines to cooperatedirectly with. and be expanded by, an expanding member as said memberprogresses into the shield. and an expanding member adapted to'engagewith and expand the tines as it is forced into the shield.

JOHN KARITZKY. Witnesses: DAVID TULLooH, F. W. KARITZKY.

